Frequencies for a_eject variable in per_aux dataset :

   Ejection |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,219       93.12       93.12
          2 |         41        3.13       96.26
          3 |         49        3.74      100.00
------------+-----------------------------------
      Total |      1,309      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016